MDA have a wealth of experience in installing structures above and below the rail infrastructure. We are proven in delivering technically challenging, high profile schemes within strict timescales with an impeccable safety record. We have recently installed a large PCC Culvert under the mainline railway in only 108 hours using a 750T crane situated on the existing track. The scheme was delivered ahead of schedule without accident or incident.
MDA have the technical and practical capability of driving hand mined drill and blast tunnels through rock. Most recently at Wookey Hole Caves, we drove a 2.4m diameter tunnel, 80m from one cave site into another to create another tourist attraction within the cave network.
MDA are often called upon to investigate underground structures in need of renovation. Grouting is one method of renovation that we specialise in, whereby the annulus of an existing structure has not been secured by grouting when initially installed. We also carry out pressure grouting, gravity fed redundant pipework grouting, displacement grouting and chemical grouting.